[LON-CAPA-admin] Server migration

Guy Albertelli II guy at albertelli.com
Wed Jan 10 15:04:58 EST 2007

Hi Peter,

There are three names associated with a machine:

- IP number
   - this is effectively not used by anything
   - if you change this the only effect you'll see is that while the
     DNS changes propagates and possibly up to 24 hours afterwards other
     machines in the network will refuse to talk to your machine
- DNS name
   - this is used by running processes on machine to know if a machine
     is connected to the network
   - if you change this we'll need to update the hosts.tab file that
     is sent out in a release and other machines will refuse to talk
     to your machine until they update to a release with the update
     hosts.tab (or they manually integrate the changes into their
   - this is used by almost all things to talk about lon-capa
   - if you change this all kinds of things will act oddly (most
     important of which being you won't get notidfied of updates to
     resources you are subscribed too.)

So in order to have as a seemsless transition is possible don't change
any of these, just change what hardware answers to these names.

guy at albertelli.com   0-7-1-6-27,137

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